fix: improve type safety and error handling in arkts-development

- Replace Record<string, Object> with specific interface types for router params
- Add error handling catch block to list-page-template.ets
- Add clarification note for router.back() with params
- Improve type safety following ArkTS best practices

arkts-development/assets/list-page-template.ets

@@ -20,18 +20,21 @@ struct {{PageName}} {
     this.loadItems();
   }
 
-  async loadItems(): Promise<void> {
-    this.isLoading = true;
-    try {
-      // TODO: Fetch items from API
-      this.items = [
-        { id: '1', title: 'Item 1', description: 'Description 1' },
-        { id: '2', title: 'Item 2', description: 'Description 2' },
-      ];
-    } finally {
-      this.isLoading = false;
-    }
-  }
+  async loadItems(): Promise<void> {
+    this.isLoading = true;
+    try {
+      // TODO: Fetch items from API
+      this.items = [
+        { id: '1', title: 'Item 1', description: 'Description 1' },
+        { id: '2', title: 'Item 2', description: 'Description 2' },
+      ];
+    } catch (error) {
+      console.error('Failed to load items:', error);
+      // TODO: Show error message to user
+    } finally {
+      this.isLoading = false;
+    }
+  }
 
   async refreshItems(): Promise<void> {
     this.isRefreshing = true;